MilliporeSigma
All Photos(1)

Documents

ABF1065

Sigma-Aldrich

Anti-SARS-CoV-2 spike protein S1 domain

Sign Into View Organizational & Contract Pricing

biological source

rabbit

Quality Level

conjugate

unconjugated

antibody form

purified antibody
serum

antibody product type

primary antibodies

clone

polyclonal

mol wt

calculated mol wt 139.13 kDa
observed mol wt ~38 and 170 kDa

purified by

(Unpurified)

species reactivity

virus

packaging

antibody small pack of 100 μL

technique(s)

ELISA: suitable
neutralization: suitable
western blot: suitable

isotype

IgG

epitope sequence

N-terminal half

Protein ID accession no.

UniProt accession no.

shipped in

dry ice

target post-translational modification

unmodified

Gene Information

vaccinia virus ... s> S(43740568)

Related Categories

General description

Spike glycoprotein (UniProt: P0DTC2; also known as S glycoprotein, E2, Peplomer protein) is encoded by the S (also known as 2) gene (Gene ID: 43740568) in Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). The SARS-CoV-2 is a positive-strand RNA virus that causes severe respiratory syndrome in human. The mature SARS-CoV-2 contains 4 structural proteins: Envelope (E), Membrane (M), Nucleocapsid (N), and the Spike protein (S). E and M proteins help in viral assembly and N protein is needed for RNA synthesis. The S protein is a single-pass type I, homotrimeric, membrane glycoprotein that is responsible for virus binding and entry into host cell. It is synthesized with a signal peptide (aa 1-12), which is subsequently cleaved off to generate the mature protein that contains an extracellular domain (aa 13-1213), a transmembrane domain (aa 1214-1234), and a cytoplasmic domain 1235-1273). The S protein is further processed into S1 (aa 13-685) and S2 (aa 686-1273) subunits by host cell furin. The presence of a furin polybasic cleavage site in S protein from SARS-CoV-2 sets it apart from S protein in SARS-CoV that possesses a monobasic S1/S2 cleavage site. The S1 subunit has the receptor binding domain (RBD; aa 319-541) that mediates entry of SARS-CoV-2 into sensitive cells through the peptidase domain of host Angiotensin-converting enzyme 2 (ACE2) with high affinity (KD = 15 nM). The S2 domain (aa 686-1213), which is reported to be well conserved, is responsible for membrane fusion. This polyclonal antibody binds and neutralizes the SARS-CoV-2 variants including the B.1.1.7; B.1.429; P.1; and B.1.351 at different levels. (Ref.: Ravichandran, S., et al. (2020). Sci Transl Med. 12(550):eabc3539).

Specificity

This rabbit polyclonal antibody detects the S1 domain of SARS-CoV-2 spike protein.

Immunogen

His-tagged recombinant fragment corresponding to the S1 domain (aa 16-685) from the extracellular region of SARS-CoV-2 spike protein.

Application

Quality Control Testing

Evaluated by Western Blotting with recombinant S1 domain and the extracellular domain of SARS-CoV-2 spike protein.

Western Blotting Analysis (WB): A 1:1,000 dilution of this antibody detected recombinant S1 domain and the complete extracellular domain of SARS-CoV-2 spike protein.

Tested Applications

Enzyme Immunoassay Analysis: A representative lot detected SARS-CoV-2 spike protein S1 domain in ELISA applications (Ravichandran, S., et. al. (2020). Sci Transl Med. 12(550):eabc3539).

Neutralizing: A representative lot neutralized SARS-CoV-2 spike protein S1 domain in Neutralizing applications (Ravichandran, S., et. al. (2020). Sci Transl Med. 12(550):eabc3539).

Note: Actual optimal working dilutions must be determined by end user as specimens, and experimental conditions may vary with the end user
Anti-SARS-CoV-2 spike protein S1 domain, Cat. No. ABF1065, is a rabbit polyclonal antibody that detects the S1 domain of SARS-CoV-2 spike protein and is tested for use in ELISA, Neutralizing, and Western Blotting.

Physical form

Rabbit polyclonal antibody in serum without preservatives.

Storage and Stability

Store at -10°C to -25°C. Handling Recommendations: Upon receipt and prior to removing the cap, centrifuge the vial and gently mix the solution. Aliquot into microcentrifuge tubes and store at -20°C. Avoid repeated freeze/thaw cycles, which may damage IgG and affect product performance.

Other Notes

Concentration: Please refer to the Certificate of Analysis for the lot-specific concentration.

Disclaimer

Unless otherwise stated in our catalog or other company documentation accompanying the product(s), our products are intended for research use only and are not to be used for any other purpose, which includes but is not limited to, unauthorized commercial uses, in vitro diagnostic uses, ex vivo or in vivo therapeutic uses or any type of consumption or application to humans or animals.

Storage Class

10 - Combustible liquids

wgk_germany

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable


Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

Already Own This Product?

Documents related to the products that you have purchased in the past have been gathered in the Document Library for your convenience.

Visit the Document Library

Difficulty Finding Your Product Or Lot/Batch Number?

Product numbers are combined with Pack Sizes/Quantity when displayed on the website (example: T1503-25G). Please make sure you enter ONLY the product number in the Product Number field (example: T1503).

Example:

T1503
Product Number
-
25G
Pack Size/Quantity

Additional examples:

705578-5MG-PW

PL860-CGA/SHF-1EA

MMYOMAG-74K-13

1000309185

enter as 1.000309185)

Having trouble? Feel free to contact Technical Service for assistance.

Lot and Batch Numbers can be found on a product's label following the words 'Lot' or 'Batch'.

Aldrich Products

  • For a lot number such as TO09019TO, enter it as 09019TO (without the first two letters 'TO').

  • For a lot number with a filling-code such as 05427ES-021, enter it as 05427ES (without the filling-code '-021').

  • For a lot number with a filling-code such as STBB0728K9, enter it as STBB0728 without the filling-code 'K9'.

Not Finding What You Are Looking For?

In some cases, a COA may not be available online. If your search was unable to find the COA you can request one.

Request COA

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service